:root {
  --bg: #ffffff;
  --fg: #111111;
  --muted: #6b7280;
  --border: #e5e7eb;
  --border-strong: #d1d5db;
  --tag-bg: #f3f4f6;
  --accent: #111111;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.06);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 96px 24px 64px;
}

.hero {
  margin-bottom: 56px;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
}

.tagline {
  font-size: clamp(1rem, 2vw, 1.125rem);
  color: var(--muted);
  margin: 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg);
  color: inherit;
  text-decoration: none;
  box-shadow: var(--shadow);
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    border-color 160ms ease;
  min-height: 160px;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-strong);
}

.card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.01em;
}

.card-tag {
  font-size: 0.75rem;
  color: var(--muted);
  background: var(--tag-bg);
  padding: 4px 8px;
  border-radius: 999px;
  white-space: nowrap;
}

.card-desc {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  flex: 1;
}

.card-arrow {
  font-size: 1rem;
  color: var(--muted);
  transition: transform 160ms ease;
}

.card:hover .card-arrow {
  transform: translateX(4px);
  color: var(--fg);
}

.footer {
  margin-top: 80px;
  color: var(--muted);
  font-size: 0.875rem;
}

.footer p {
  margin: 0;
}

@media (max-width: 480px) {
  .container {
    padding: 64px 20px 48px;
  }
  .hero {
    margin-bottom: 40px;
  }
}